﻿
#region Copyright & License
// --------------------------
// Copyright 2008 Daniel Gray
// --------------------------
// This file is part of Kale.
//
// Kale is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Kale is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with Kale.  If not, see <http://www.gnu.org/licenses/>.
#endregion
#region File details
// --------------------------------------------------------
// Filename          : NoNodeCache.cs
// Author            : Daniel Gray
// Created           : 15/04/2008
// --------------------------------------------------------
#endregion
            
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Kale.Core
{
   /// <summary>
   /// Dummy implementation of INodeCache used when no node caching is required.
   /// </summary>
   public class NoNodeCache : INodeCache
   {
      #region INodeCache Members

      public void AddNode(IImageNode node)
      {
         //no-op
      }

      public void RemoveNode(IImageNode node)
      {
         //no-op
      }

      public void RemoveNode(NodeId id)
      {
         //no-op
      }

      public void RemoveNodeAndChildren(IImageNode node)
      {
         //no-op
      }

      public void RemoveNodeAndChildren(NodeId id)
      {
         //no-op
      }

      public void Clear()
      {
         //no-op
      }

      public bool HasNode(NodeId id)
      {
         return false;
      }

      public IImageNode this[NodeId id]
      {
         get { return null; }
      }

      public IImageNode GetNode(NodeId id)
      {
         return null;
      }

      public int Count
      {
         get { return 0; }
      }

      #endregion
   }
}
